At its closest approach, DA14 will be 27,300 km from Earth, about a tenth of the distance between here and the Moon.

The asteroid will be traveling 27,700 kph when it careens past the Earth at around 19.40 GMT next Friday, according to NASA`s Near-Earth Object Program Office, which has been tracking DA14 since it was discovered a year ago by scientists at La Sagra Observatory in Spain.

Though the asteroid is about 13 stories tall, it will not be visible to the naked eye.

DA14 will pass inside the orbits of geosynchronous communications satellites, but far above the altitude of the International Space Station, NASA said.

An asteroid the size of DA14 approaches the Earth roughly every four decades, while impacts occur at intervals of roughly 1,200 years, Yeomans said.

The most recent significant asteroid impact was in 1908, when a space rock crashed in Tunguska, Siberia. The explosion flattened trees for hundreds of square kilometers.